Effect of Interfacial Blocking Layer Morphology on the Solar Peroxydisulfate Production of WO3 Nanoflakes

Sung Hoon Ahn; Jiheng Zhao; Jong Hak Kim; Xiaolin Zheng

doi:10.1016/j.electacta.2017.05.097

Effect of Interfacial Blocking Layer Morphology on the Solar Peroxydisulfate Production of WO₃ Nanoflakes

Sung Hoon Ahn, Jiheng Zhao, Jong Hak Kim, Xiaolin Zheng

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Herein, we investigate the morphological effect of WO₃ interfacial blocking layer on the PEC performance of WO₃ nanoflakes grown on fluorine-doped tin oxide (FTO) glass as a model photoanode system. We found that the mesoporous WO₃ interfacial blocking layer is much more effective than the random WO₃ nanoparticle interfacial layer in reducing the interfacial recombination. With the mesoporous interfacial blocking layer, the photocurrent density of WO₃ photoanode reaches 2.6 mA cm⁻² at 1.23 V vs RHE. This PEC system in 1 M H₂SO₄ solution produces high-value added peroxydisulfate (S₂O₈²⁻) and hydrogen efficiently at over ∼95% faradaic efficiency.

Original language	English
Pages (from-to)	184-191
Number of pages	8
Journal	Electrochimica Acta
Volume	244
DOIs	https://doi.org/10.1016/j.electacta.2017.05.097
Publication status	Published - 2017 Aug 1

Bibliographical note

Funding Information:
This work was funded by the Bay Area Photovoltaics Consortium (BAPVC). J.H. Kim acknowledges financial support of National Research Foundation (NRF) grant through the Korea Center for Artificial Photosynthesis (KCAP) (2009-0093883).

Publisher Copyright:
© 2017 Elsevier Ltd

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)
Electrochemistry

Access to Document

10.1016/j.electacta.2017.05.097

Cite this

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title = "Effect of Interfacial Blocking Layer Morphology on the Solar Peroxydisulfate Production of WO3 Nanoflakes",

abstract = "Herein, we investigate the morphological effect of WO3 interfacial blocking layer on the PEC performance of WO3 nanoflakes grown on fluorine-doped tin oxide (FTO) glass as a model photoanode system. We found that the mesoporous WO3 interfacial blocking layer is much more effective than the random WO3 nanoparticle interfacial layer in reducing the interfacial recombination. With the mesoporous interfacial blocking layer, the photocurrent density of WO3 photoanode reaches 2.6 mA cm−2 at 1.23 V vs RHE. This PEC system in 1 M H2SO4 solution produces high-value added peroxydisulfate (S2O82−) and hydrogen efficiently at over ∼95% faradaic efficiency.",

author = "Ahn, {Sung Hoon} and Jiheng Zhao and Kim, {Jong Hak} and Xiaolin Zheng",

note = "Funding Information: This work was funded by the Bay Area Photovoltaics Consortium (BAPVC). J.H. Kim acknowledges financial support of National Research Foundation (NRF) grant through the Korea Center for Artificial Photosynthesis (KCAP) (2009-0093883). Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

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AU - Ahn, Sung Hoon

AU - Zhao, Jiheng

AU - Kim, Jong Hak

AU - Zheng, Xiaolin

N1 - Funding Information: This work was funded by the Bay Area Photovoltaics Consortium (BAPVC). J.H. Kim acknowledges financial support of National Research Foundation (NRF) grant through the Korea Center for Artificial Photosynthesis (KCAP) (2009-0093883). Publisher Copyright: © 2017 Elsevier Ltd

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N2 - Herein, we investigate the morphological effect of WO3 interfacial blocking layer on the PEC performance of WO3 nanoflakes grown on fluorine-doped tin oxide (FTO) glass as a model photoanode system. We found that the mesoporous WO3 interfacial blocking layer is much more effective than the random WO3 nanoparticle interfacial layer in reducing the interfacial recombination. With the mesoporous interfacial blocking layer, the photocurrent density of WO3 photoanode reaches 2.6 mA cm−2 at 1.23 V vs RHE. This PEC system in 1 M H2SO4 solution produces high-value added peroxydisulfate (S2O82−) and hydrogen efficiently at over ∼95% faradaic efficiency.

AB - Herein, we investigate the morphological effect of WO3 interfacial blocking layer on the PEC performance of WO3 nanoflakes grown on fluorine-doped tin oxide (FTO) glass as a model photoanode system. We found that the mesoporous WO3 interfacial blocking layer is much more effective than the random WO3 nanoparticle interfacial layer in reducing the interfacial recombination. With the mesoporous interfacial blocking layer, the photocurrent density of WO3 photoanode reaches 2.6 mA cm−2 at 1.23 V vs RHE. This PEC system in 1 M H2SO4 solution produces high-value added peroxydisulfate (S2O82−) and hydrogen efficiently at over ∼95% faradaic efficiency.

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